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Has anyone seen this work?
Krause (presumably Krause, Christian Gottfried c 1719 — 1770)
I Concerto a viola concertato, 2 violini, viola e basso
It appears in the Breitkopf catalog of 1770 (at SLUB Halle VD18)

I am not sure, if this work has survived -
I checked the manuscript and autograph card catalogs at SBB today, and it is not among the holdings.
There are almost a dozen works with oboe by Krause in the Breitkopf catalog, but all of them seem to be lost